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Acta Metall Sin  2010, Vol. 46 Issue (4): 385-389    DOI: 10.3724/SP.J.1037.2009.00620
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NUMERICAL INVESTIGATION ON ENERGY BALANCE AND DEPOSITION BEHAVIOR DURING COLD SPRAYING
WU Xiangkun; ZHOU Xianglin; WANG Jianguo; ZHANG Jishan
State Key Laboratory for Advanced Metals and Materials; University of Science and Technology Beijing; Beijing 100083
Cite this article: 

WU Xiangkun ZHOU Xianglin WANG Jianguo ZHANG Jishan. NUMERICAL INVESTIGATION ON ENERGY BALANCE AND DEPOSITION BEHAVIOR DURING COLD SPRAYING. Acta Metall Sin, 2010, 46(4): 385-389.

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Abstract  

In this paper, the physical process during the impact of a cold spraying spherical particle with an infinite homogencous substrate was simulated using the finite element method (FEM). The effects of the impact vlocity, the particle and substrate materials on thimpact bebvior were invesigated. The results show that a significant amount of the initial total kinetic energy of the particle is dissipated due to the plastc deformation of particle and substrate, finally transforming to ther nternal energies. An energy partition coefficient K, defined as the ratio of the enegies distributed in the particle and substrate, has been introduced, which is closely related to the iniiatotakinetic enery of the particle and the deformability of the particle and substratduring the impactIt is fond that it is difficult to make a particle with hight K and a substrate with low K cohere strongly.

Key words:  cold spraying      partition coefficient of energy      numerical simulation     
Received:  16 September 2009     
Fund: 

Supported by National Natural Science Foundation of China (Nos.50871019 and 50874009)

URL: 

https://www.ams.org.cn/EN/10.3724/SP.J.1037.2009.00620     OR     https://www.ams.org.cn/EN/Y2010/V46/I4/385

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